QgsMapTip Class Reference

A maptip is a class to display a tip on a map canvas when a mouse is hovered over a feature. More...

#include <qgsmaptip.h>

Public Member Functions
	QgsMapTip ()
	Default constructor.
virtual	~QgsMapTip ()
	Destructor.
void	showMapTip (QgsMapLayer *thepLayer, QgsPoint &theMapPosition, QPoint &thePixelPosition, QgsMapCanvas *mpMapCanvas)
	Show a maptip at a given point on the map canvas.
void	clear (QgsMapCanvas *mpMapCanvas)
	Clear the current maptip if it exists.

Private Member Functions
QString	fetchFeature (QgsMapLayer *thepLayer, QgsPoint &theMapPosition, QgsMapCanvas *thepMapCanvas)
QString	replaceText (QString displayText, QgsVectorLayer *layer, QgsFeature &feat)

Private Attributes
bool	mMapTipVisible
QPoint	mLastPosition

Detailed Description

A maptip is a class to display a tip on a map canvas when a mouse is hovered over a feature.

Definition at line 29 of file qgsmaptip.h.

Constructor & Destructor Documentation

QgsMapTip::QgsMapTip

(

)

Default constructor.

Definition at line 28 of file qgsmaptip.cpp.

References mMapTipVisible.

QgsMapTip::~QgsMapTip ( )

virtual

Destructor.

Definition at line 34 of file qgsmaptip.cpp.

Member Function Documentation

void QgsMapTip::clear

(

QgsMapCanvas *

mpMapCanvas

)

Clear the current maptip if it exists.

Parameters

mpMapCanvas

the canvas from which the tip should be cleared.

Definition at line 64 of file qgsmaptip.cpp.

References mLastPosition, and mMapTipVisible.

QString QgsMapTip::fetchFeature ( QgsMapLayer *  thepLayer, QgsPoint &  theMapPosition, QgsMapCanvas *  thepMapCanvas  )

private

Definition at line 75 of file qgsmaptip.cpp.

References QgsFeature::attribute(), QGis::DEFAULT_IDENTIFY_RADIUS, QgsVectorLayer::displayField(), QgsFeatureRequest::ExactIntersect, QgsMapCanvas::extent(), QgsVectorLayer::fieldNameIndex(), QgsVectorLayer::getFeatures(), QgsMapCanvas::mapRenderer(), QgsMapRenderer::mapToLayerCoordinates(), QgsFeatureIterator::nextFeature(), QgsExpression::replaceExpressionText(), QgsRectangle::setXMaximum(), QgsRectangle::setXMinimum(), QgsRectangle::setYMaximum(), QgsRectangle::setYMinimum(), QgsRectangle::width(), QgsPoint::x(), and QgsPoint::y().

Referenced by showMapTip().

QString QgsMapTip::replaceText ( QString  displayText, QgsVectorLayer *  layer, QgsFeature &  feat  )

private

void QgsMapTip::showMapTip	(	QgsMapLayer *	thepLayer,
		QgsPoint &	theMapPosition,
		QPoint &	thePixelPosition,
		QgsMapCanvas *	mpMapCanvas
	)

Show a maptip at a given point on the map canvas.

Parameters

thepLayer	a qgis vector map layer pointer that will be used to provide the attribute data for the map tip.
theMapPosition	a reference to the position of the cursor in map coordinatess.
thePixelPosition	a reference to the position of the cursor in pixel coordinates.
mpMapCanvas	a map canvas on which the tip is drawn

Definition at line 39 of file qgsmaptip.cpp.

References fetchFeature(), mLastPosition, and mMapTipVisible.

Member Data Documentation

QPoint QgsMapTip::mLastPosition

private

Definition at line 68 of file qgsmaptip.h.

Referenced by clear(), and showMapTip().

bool QgsMapTip::mMapTipVisible

private

Definition at line 65 of file qgsmaptip.h.

Referenced by clear(), QgsMapTip(), and showMapTip().

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The documentation for this class was generated from the following files:

• /tmp/buildd/qgis-2.0.1/src/gui/qgsmaptip.h
• /tmp/buildd/qgis-2.0.1/src/gui/qgsmaptip.cpp